Delta Electronics Q48DR User Manual

FEATURES
High Efficiency: 88%@ 1.8V/15A, 3.3V/15A
Standard footprint:57.9mmx36.8mmx8.5mm
(2.28”×1.45”×0.33”)
Industry standard pin out
2:1 input voltage range
Fixed frequency operation
Fully protected: OTP, OCP, OVP, UVLO
No minimum load required
1500 V isolation and basic insulation
Two independent power train and separate
trim for each output
ISO 9001, TL 9000, ISO 14001, QS9000,
OHSAS18001 certified manufacturing facility
UL/cUL 60950 (US & Canada) Recognized,
and TUV (EN60950) Certified
CE mark meets 73/23/EEC and 93/68/EEC
directives
Delphi Series Q48DR, 87W-100W, Quarter Brick Dual Output, DC/DC Power Modules:
48V in, 1.8V and 3.3V, 15A out each channel
isolated DC/DC converters are latest offering from one of the world’s
largest power supply manufacturers — Delta Electronics, Inc. This
product family provides up to 100 watts of power or 15A of output current
(each channel simultaneously) in an industry standard footprint. Both
output channels can be used independently of each other with option to
trim each channel either in the same direction or in reversion direction.
With creative design technology and optimized circuit, these converters
possess outstanding electrical and thermal performance, as well as
extremely high reliability under highly stressful operating conditions. All
the models are fully protected from abnormal input/output voltage,
current, and temperature conditions. The Delphi Series converters meet
all safety requirements with basic insulation.
OPTIONS
Optional second trim pin for
independent trim of the two outputs
Positive On/Off logic
Short pin lengths available
APPLICATIONS
Telecom/DataCom
Wireless Networks
Optical Network Equipment Server and Data Storage
Industrial/Test Equipment
DATASHEET DS_Q48DR1R833_03162007
1
TECHNICAL SPECIFICATIONS (T
=25°C, airflow rate=300 LFM, Vin=48Vdc, nominal Vout unless otherwise noted.)
A
PARAMETER NOTES and CONDITIONS Q48DR1R833NRFA
Min. Typ. Max. Units
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Continuous 80 Vdc Transient (100ms) <100ms 100 Vdc Operating Temperature Please refer to figure 27 for measuring point -40 114 °C Storage Temperature -55 125 °C Input/Output Isolation Voltage 1500 Vdc
INPUT CHARACTERISTICS
Operating Input Voltage 36 48 75 Vdc Input Under-Voltage Lockout
Turn-On Voltage Threshold 33 34 35 Vdc
Turn-Off Voltage Threshold 31 32 33 Vdc
Lockout Hysteresis Voltage 1 2 3 Vdc
Maximum Input Current 100%load, 36Vin 2.9 A No-Load Input Current 100 150 mA Off Converter Input Current 5 10 mA Inrush Current(I2t) 0.015 A2s Input Reflected-Ripple Current P-P thru 12µH inductor, 5Hz to 20MHz 10 mA
Input Voltage Ripple Rejection 120Hz 50 dB
OUTPUT CHARACTERISTICS
Output Voltage Set Point
Output Voltage Regulation
Over Load
Over Line Vin=36V to 75V,Io1=Io2=full load
Cross Regulation Worse Case ±5 ±10 mV
Over Temperature
Total Output Voltage Range Over sample load, line and temperature
Output Voltage Ripple and Noise 5Hz to 20MHz bandwidth
Peak-to-Peak Io1, Io2 Full Load, 1µF ceramic, 10µF tantalum
RMS Io1, Io2 Full Load, 1µF ceramic, 10µF tantalum
Operating Output Current Range
Output DC Current-Limit Inception
DYNAMIC CHARACTERISTICS
Output Voltage Current Transient 48V, 10µF Tan & 1µF Ceramic load cap, 0.1A/µs
Positive Step Change in Output Current Iout1from 50% Io, max to 75% Io, max
Negative Step Change in Output Current Iout2 from 75% Io, max to 50% Io, max
Cross dynamic Each channel independence 20 mV
Settling Time (within 1% Vout nominal) 150 US
Turn-On Transient
Start-up Time, From On/Off Control 10 15 MS
Start-up Time, From Input 10 15 mS
Maximum Output Capacitance Full load; 5% overshoot of Vout at startup
EFFICIENCY
100% Load Iout1, Iout2 full load, 48vdc Vin 88 % 60% Load Iout1, Iout2 60% of full load, 48vdc Vin 88 %
ISOLATION C HARACTERISTICS
Input to Output 1500 Vdc Isolation Resistance 10 M Isolation Capacitance 3000 pF
FEATURE CHARACTERISTICS
Switching Frequency 350 kHz ON/OFF Control, (Logic Low-Module ON)
Logic Low Von/off at Ion/off=1.0mA 0 0.8 V
Logic High Von/off at Ion/off=0.0 µA 18 V
ON/OFF Current Ion/off at Von/off=0.0V 1 mA
Leakage Current Logic High, Von/off=15V 50 uA
Output Voltage Trim Range Output Over-Voltage Protection Over full temp range; %of nominal Vout 115 122 130 %
GENERAL SPECIFICATIONS
MTBF Io=80% of Io, max; Ta=25°C,300FLM 3.0 M hours Weight 26.5 grams Over-Temperature Shutdown Please refer to figure 27 for measuring point 122 °C
Vin=48V, Io=Io.max, Tc=25
Io1=Io, min to Io, max, Io2=0A Vout 1 Io2=Io, min to Io, max, Io1=0A Vout 2
Tc=-40 to 85
Vout 1 0 15 Vout 2 0 15 Vout 1 100% 150% Vout 2 100% 150%
Pout ≦ max rated power
Vout 1 1.771 1.800 1.829 Vout 2 3.247 3.300 3.353
±5 ±10 mV
Vout 1 Vout 2
Vout 1 1.746 1.854 V
Vout 2 3.201 3.399 V
Vout 1 40 80 Vout 2 40 80 Vout 1 10 30 Vout 2 10 30
Vout 1 100 Vout 2 Vout 1 100 Vout 2
Vout 1 10000 Vout 2 10000
±3 ±10 V
±15 ±50
-10 +10 %
100
100
mV
mV
Vdc
mV
mV
µF
A
DS_Q48DR1R833_03162007
2
ELECTRICAL CHARACTERISTICS CURVES
Figure 1: Efficiency vs. load current Iout1 for minimum, nominal, and maximum input voltage at 25
Figure 3: Efficiency vs. load current Iout1 and Iout2 for minimum, nominal, and maximum input voltage at 25 Iout1=Iout2
°C, for Iout2=7.5A.
°C, for
Figure 2: Efficiency vs. load current Iout2 for minimum,
nominal, and maximum input voltage at 25
Figure 4: Power dissipation vs. load current for minimum,
nominal, and maximum input voltage at 25°C. for Iout1=Iout2
°C, for Iout1=7.5A
DS_Q48DR1R833_03162007
3
ELECTRICAL CHARACTERISTICS CURVES
Vout2
Vout1
Figure 5: Turn-on transient at zero load current(2ms/div). Vin=48V. Negative logic turn on. Top Trace: Vout; 1V/div; Bottom Trace: ON/OFF input: 5V/div
Vout2
Vout2
Vout1
Figure 6: Turn-on transient at full rated load current (resistive
load) (2 ms/div). Vin=48V. Negative logic turn on. Top Trace: Vout; 1V/div; Bottom Trace: ON/OFF input: 5V/div
Vout2
Vout1
Figure 7: Turn-on transient at zero load current (2ms/div). Vin=48V. Positive logic turns on. Top Trace: Vout; 1V/div; Bottom Trace: ON/OFF input: 5V/div
Figure 8: Turn-on transient at full load current (2ms/div).
Vin=48V. Positive logic turns on. Top Trace: Vout; 1V/div; Bottom Trace: ON/OFF input: 5V/div
Vout1
DS_Q48DR1R833_03162007
4
ELECTRICAL CHARACTERISTICS CURVES
)
ELECTRICAL CHARACTERISTICS CURVES
Ch1
Ch2
Ch3
Ch4
Figure 9: Output voltage response to step-change in load
Fteigure 9: Typical full load input characteristics at room
current Iout2 (75%-50%-75% of Io, max; di/dt = 2.5A/µs) at
mperature
Iout1=7.5A. Load cap: 470µF, 35m
ESR solid electrolytic capacitor and 1µF ceramic capacitor. Ch1=Vout2 (100mV/div), Ch2=Iout2 (7.5A/div), Ch3=Vout1 (100mV/div) , Ch4=Iout1 (7.5A/div) Scope measurement should be made using a BNC cable (length shorter than 20 inches). Position the load between 51 mm to 76 mm (2 inches to 3 inches) from the module.
Ch1
Ch1
Ch2
Ch3
Ch3
Ch4
Ch4
6
Figure 10: Output voltage response to step-change in load
F
igure 10: Output voltage response to step-change in load
current Iout1 (75%-50%-75% of Io, max; di/dt = 2.5A/µs) at
cu
rrent Iout2 (75%-50%-75% of Io, max; di/dt = 0.1A/µs) at
Iout2=7.5A. Load cap: 470µF, 35m
I
o
ut1=7.5A. Load cap: 10µF, tantalum capacitor and 1µF ceramic
capacitor and 1µF ceramic capacitor. Ch1=Vout2 (100mV/div),
ca
pacitor. Ch1=Vout2 (100mV/div), Ch2=Iout2 (7.5A/div),
Ch2=Iout2 (7.5A/div), Ch3=Vout1 (100mV/div), Ch4=Iout1
C
h3=Vout1 (100mV/div), Ch4=Iout1 (7.5A/div) Scope
(7.5A/div) Scope measurement should be made using a BNC
m
easurement should be made using a BNC cable (len gth shorter
cable (length shorter than 20 inches). Position the load between
th mm (2
an 20 inches). Position the load between 51 mm to 76
51 mm to 76 mm (2 inches to 3 inches) from the module.
inches to 3 inches) from the module.
ESR solid electrolytic
Ch1
Ch1
Ch2
Ch2
Ch3
Ch3
Ch4
Ch4
Figure 11: Output voltage response to step-change in load current Iout2 and Iout1 (75%-50%-75% of Io, max; di/dt =
2.5A/µs). Load cap: 470µF, 35m
F
igure 11: Output voltage response to step-change in load
capacitor and 1µF ceramic capacitor. Ch1=Vout2
c
urrent Iout1 (75%-50%-75% of Io, max; di/dt = 0.1A/µs) at (100mV/div), Ch2=Iout2 (7.5A/div), Ch3=Vout1 (100mV/div) ,
Io
ut2=7.5A. Load cap: 10µF, tantalum capacitor and 1µF
Ch4=Iout1 (7.5A/div) Scope measurement should be made
c
eramic capacitor. Ch1=Vout2 (100mV/div), Ch2=Iout2 using a BNC cable (length shorter than 20 inches). Position
(
7.5A/div), Ch3=Vout1 (100mV/div), Ch4=Iout1 (7.5A/div) the load between 51 mm to 76 mm (2 inches to 3 inches)
S
cope measurement should be made using a BNC cable
from the module.
(l n 20 inches). Position the load between
ength shorter tha
51 mm to 76 mm (2 inches to 3 inches) from the module.
ESR solid electrolytic
Ch1
Ch2
Ch3
Ch4
Figure 12: Test set-up diagram showing measurement points for Input Terminal Ripple Current and Input Reflected Ripple Current.
cF : Output voltage response to step-change in load
igure 12
Note: Measured input reflected-ripple current with a simulated
u
rrent Iout2 and Iout1 (75%-50%-75% of Io, max; di/dt =
source Inductance (L
0.
1A/µs). Load cap: 10µF, tantalum capacitor and 1µF ceramic
battery impedance. Measure current as shown above
ca 7.5A/div),
pacitor. Ch1=Vout2 (100mV/div), Ch2=Iout2 (
of 12 µH. Capacitor Cs offset possible
TEST
Ch3=Vout1 (100mV/div), Ch4=Iout1 (7.5A/div) Scope measurement should be made using a BNC cable (len gth shorter than 20 inches). Position the load between 51 mm to 76 mm (2 inches to 3 inches) from the module.
DS_Q48DR1R833_03162007
5
ELECTRICAL CHARACTERISTICS CURVES
V
)
Figure 13: Input Terminal Ripple Current-ic, at full rated output current and nominal input voltage with 12µH source impedance and 33µF electrolytic capacitor (500 mA/div, 2us/div).
StripCopper
Vo(+)
10u 1u
SCOPE RESISTI
LOAD
Vo(-)
Figure 14: Input reflected ripple current-i source inductor at nominal input voltage and rated load c urrent (20 mA/div, 2us/div).
, through a 12µH
s
Figure 15: Output voltage noise and ripple measurement test setup
DS_Q48DR1R833_03162007
Figure 16: Output voltage ripple at nominal input voltage and rated load current (Iout1=Iout2=15A)(20 mV/div, 1us/div trace: Vout2(20mV/div), Bottom trace(20mV/div) Load capacitance: 1µF ceramic capacitor and 10µF tantalum capacitor. Bandwidth: 20 MHz. Scope measurements should be made using a BNC cable (length shorter than 20 inches). Position the load between 51 mm to 76 mm (2 inches to 3 inches) from the module.
. Top
6
ELECTRICAL CHARACTERISTICS CURVES
Figure 17: Output voltage vs. load current Iout1 showing typical current limit curves and converter shutdown points.
Figure 18: Output voltage vs. load current Iout2 showing typical
current limit curves and converter shutdown points.
DS_Q48DR1R833_03162007
7
DESIGN CONSIDERATIONS
Input Source Impedance
The impedance of the input source connecting to the DC/DC power modules will interact with the modules and affect the stability. A low ac-impedance input source is recommended. If the source inductance is more than a few µH, we advise adding a 10 to 100 µF electrolytic capacitor (ESR < 0.7 at 100 kHz) mounted close to the input of the module to improve the
stability.
Layout and EMC Considerations
Delta’s DC/DC power modules are designed to operate in a wide variety of systems and applications. For design assistance with EMC compliance and related PWB layout issues, please contact Delta’s technical support team. An external input filter module is available for easier EMC compliance design. Application notes to assist designers in addressing these issues are pending release.
Safety Considerations
The power module must be installed in compliance with the spacing and separation requirements of the end­user’s safety agency standard, i.e., UL60950, CAN/CSA-C22.2 No. 60950-00 and EN60950:2000 and IEC60950-1999, if the system in which the power module is to be used must meet safety agency requirements.
When the input source is 60 Vdc or below, the power module meets SELV (safety extra-low voltage) requirements. If the input source is a hazardous voltage which is greater than 60 Vdc and less than or equal to 75 Vdc, for the module’s output to meet SELV requirements, all of the following must be met:
The input source must be insulated from any
hazardous voltages, including the ac mains, with reinforced insulation.
One Vi pin and one Vo pin are grounded, or all the
input and output pins are kept floating.
The input terminals of the module are not operator
accessible.
If the metal baseplate is grounded the output must
be also grounded.
A SELV reliability test is conducted on the system
where the module is used to ensure that under a single fault, hazardous voltage does not appear at the module’s output.
Do not ground one of the input pins without grounding one of the output pins. This connection may allow a non-SELV voltage to appear between the output pin and ground.
The power module has extra-low voltage (ELV) outputs when all inputs are ELV.
This power module is not internally fused. To achieve optimum safety and system protection, an input line fuse is highly recommended. The safety agencies require a normal-blow fuse with 7A maximum rating to be installed in the ungrounded lead. A lower rated fuse can be used based on the maximum inrush transient energy and maximum input current.
Soldering and Cleaning Considerations
Post solder cleaning is usually the final board assembly process before the board or system undergoes electrical testing. Inadequate cleaning and/or drying may lower the reliability of a power module and severely affect the finished circuit board assembly test. Adequate cleaning and/or drying is especially important for un-encapsulated and/or open frame type power modules. For assistance on appropriate soldering and cleaning procedures, please contact Delta’s technical support team.
DS_Q48DR1R833_03162007
8
FEATURES DESCRIPTIONS
Over-Current Protection
The modules include an internal output over-current protection circuit, which will endure current limiting for an unlimited duration during output overload. If the output current exceeds the OCP set point, the modules will automatically shut down (hiccup mode).
The modules will try to restart after shutdown. If the overload condition still exists, the module will shut down again. This restart trial will continue until the overload condition is corrected.
Over-Voltage Protection
The modules include an internal output over-voltage protection circuit, which monitors the voltage on the output terminals. If this voltage exceeds the over­voltage set point, the module will shut down.
The module will try to restart after shutdown. If the over­voltage condition still exists during restart, the module will shut down again. This restart trial will continue until the output voltage is within specification.
Over-Temperature Protection
The over-temperature protection consists of circuitry that provides protection from thermal damage. If the temperature exceeds the over-temperature threshold the module will shut down.
The module will try to restart after shutdown. If the over­temperature condition still exists during restart, the module will shut down again. This restart trial will continue until the temperature is within specification.
Remote On/Off
The remote on/off feature on the module can be either negative or positive logic. Negative logic turns the module on during a logic low and off during a logic high. Positive logic turns the modules on during a logic high and off during a logic low.
Remote on/off can be controlled by an external switch between the on/off terminal and the Vi(-) terminal. The switch can be an open collector or open drain.
For negative logic if the remote on/off feature is not used, please short the on/off pin to Vi(-). For positive logic if the remote on/off feature is not used, please leave the on/off pin to floating.
Figure 19: Remote on/off implementation
Output Voltage Adjustment (TRIM)
To increase or decrease the output voltage set point, the modules may be connected with an external resistor between the TRIM pin and either Vout1(+) or RTN. The TRIM pin should be left open if this feature is not used.
Figure 20: Circuit configuration for trim-down (decrease output voltage)
If the external resistor is connected between the TRIM and Vout1(+) pin, the output voltage set point decreases (Fig. 20). The external resistor value is from the table below.
DS_Q48DR1R833_03162007
9
FEATURES DESCRIPTIONS (CON.)
Figure 21: Circuit configuration for trim-up (increase output voltage)
If the external resistor is connected between the TRIM and RTN, the output voltage set point increases (Fig.
21). The external resistor value is from table below.
Trim Resistor
(Vout Increase)
Δ [%] Rtrim-up [KΩ]
1 57.4 2 25.5 3 14.9 4 9.57 5 6.38 6 4.26 7 2.47 8 1.60 9 709
10 0
The output voltage can be increased by the trim pin, When using trim; the output voltage of the module is usually increased, which increases the power output of the module with the same output current. Care should be taken to ensure that the maximum output power of the module remains at or below the maximum rated power.
Trim Resistor
(Vout Decrease)
Δ [%]
Rtrim-down [KΩ]
1 70.2 2 31.2 3 18.2 4 11.7 5 7.80 6 5.20 7 3.34 8 1.95 9 867
10 0
DS_Q48DR1R833_03162007
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THERMAL CONSIDERATIONS
A
Y
Thermal management is an important part of the system design. To ensure proper, reliable operation, sufficient cooling of the power module is needed over the entire temperature range of the module. Convection cooling is usually the dominant mode of heat transfer.
Hence, the choice of equipment to characterize the thermal performance of the power module is a wind tunnel.
Thermal Testing Setup
Delta’s DC/DC power modules are characterized in heated vertical wind tunnels that simulate the thermal environments encountered in most electronics equipment. This type of equipment commonly uses vertically mounted circuit cards in cabinet racks in which the power modules are mounted.
The following figure shows the wind tunnel characterization setup. The power module is mounted on a test PWB and is vertically positioned within the wind tunnel. The space between the neighboring PWB and the top of the power module is constantly kept at
6.35mm (0.25’’).
Thermal Derating
Heat can be removed by increasing airflow over the module. The module’s hottest spot is less than +114°C. To enhance system reliability, the power module should always be operated below the maximum operating temperature. If the temperature exceeds the maximum module temperature, reliability of the unit may be affected.
FACING PWB
PWB
THERMAL CURVES
Figure 23: Hot spot temperature measured point
The allowed maximum hot spot temperature is defin ed at
114
110%
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
20 25 30 35 40 45 50 55 60 65 70 75 80 85
Figure 24: Output load vs. ambient temperature and air velocity @V
Q48DR1R833(Standard) Output Load vs. Ambient Temperature and Air Velocity
Output Load(%)
Natural
Convection
=48V(Transverse Orientation)
in
@ Vin = 48V (Transverse Orientation)
100LFM
200LFM
300LFM
600LFM
500LFM
400LFM
Ambient Temperature (℃)
AIR VELOCIT AND AMBIENT
TEMPERATURE
MEASURED BELOW
THE MODULE
Note: Wind Tunnel Test Setup Figure Dim nsions are in millimeters and (Inche
Figure 22: Wind tunnel test setup
DS_Q48DR1R833_03162007
MODULE
50.8 (2.0”)
IR FLOW
12.7 (0.5”)
e
11
MECHANICAL DRAWING
Pin No. Name Function
1 2 3 4 5 6 7 8
-Vin ON/OFF +Vin +Vout2 TRIM Output RTN +Vout1 Optional
Notes:
1 2
DS_Q48DR1R833_03162007
Pins 1-8 are 1.00mm (0.040”) diameter All pins are copper with Tin plating.
Negative input voltage Remote ON/OFF Positive input voltage Positive output voltage2 Output voltage trim
Positive output voltage1 TRIM2
12
PART NUMBERING SYSTEM
Q D R 1R8 33 N R
Form Factor Input
Q – Quarter Brick
48
Number of
Voltage
48 - 36-75V D-Dual Output R-Open frame 2R5-2.5V
Outputs
Product
Series
Output
Voltage 1
3R3-3.3V 1R8-1.8V 1R5-1.5V
Output
Voltage 2
33-3.3V 50-5.0V
ON/OFF
Logic
N-Negative
(Default)
P-Positive
F A
Pin Length Option Code
R-0.170” (Default) N-0.145” K-0.110”
F- RoHS 6/6
(Lead Free)
A - Standard
Functions (Default)
B - with second
trim pin
MODEL LIST
MODEL NAME INPUT
Q48DR1R533NRFA 36V~75V 2.8A 1.5V/15A 3.3V/15A 87.5%
Q48DR1R833NRFA 36V~75V 2.9A 1.8V/15A 3.3V/15A 88.0%
Q48DR2R533NRFA 36V~75V 3.3A 2.5V/15A 3.3V/15A 88.0%
Q48DR3R350NRFA 36V~75V 3.8A 3.3V/15A 5.0V/10A 88.5%
OUTPUT
*
EFF @ Full Load
CONTACT:
USA:
Telephone: East Coast: (888) 335 8201 West Coast: (888) 335 8208 Fax: (978) 656 3964
DCDC@delta-corp.com
Email:
WARRANTY
Delta offers a two (2) year limited warranty. Complete warranty information is listed on our web site or is available upon request from Delta.
Information furnished by Delta is believed to be accurate and reliable. However, no responsibility is assumed by Delta for its use, nor for any infringements of patents or other rights of third parties, which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Delta. Delta reserves the right to revise these specifications at any time, without notice
www.delta.com.tw/dcdc
Europe:
Phone: +41 31 998 53 11 Fax: +41 31 998 53 53 Email:
DCDC@delta-es.com
.
Asia & the rest of world:
Telephone: +886 3 4526107 ext 6220 Fax: +886 3 4513485
DCDC@delta.com.tw
Email:
DS_Q48DR1R833_03162007
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